They're charged with robbery, aggravated assault and reckless endangerment, and Anderson is charged as an adult, police said. They remain in York County Prison on $20,000 bail each.

What happened: The robbery happened about 8:50 p.m. on Tower Drive.

Police said the victims picked up Anderson and Williams and were heading west on Tower Drive when one of the alleged robbers told the man driving to turn down a gravel driveway.

When the driver asked why, Anderson and Williams pulled out knives and demanded the victims' cash and belongings, according to police. The driver suffered a cut on his chin or throat during the robbery.

The young woman tried to escape but was confronted outside the car by two males wearing ski masks.

Police said they determined the masked men were Courtney and Heidler.

All four robbers ran away after the victims said they had no valuables to hand over, police said.

Anyone with information about the robbery is asked to call police at 292-3647, or leave a tip online at nycrpd.org.

-- Staff writer Liz Evans Scolforo can also be reached at levans@yorkdispatch.com.